OLS-1211 | Liquid Encapsulant - Two part Epoxy

Operating instructions

We recommend to process the product in a clean room at room temperature with a relative humidity lower than 35%.

1. Preheat Part A to 50-55°C for 2 hours, making sure that you adjust this to the external temperature. Do not preheat for more that 24 hours.
2. Mix part A with the diffusion agent and the pigment and stir well. Afterwards add Part B in a 100:100 ratio.
3. To ensure that all the entrapped air bubbles are removed after mixing, the mixture of Part A and B should be done in a vacuum and degassed at 0.1MPa for 10-15 minutes.
4. Clean and dry the glue injection tool. Use it within 90minutes in room temperature and under tightly sealed conditions, ideally in a vacuum.

Curing

It is advised to cure in two stages to reduce thermal stress.

• The mixture should be cured in the oven within 30 minutes after dispensing.
• The oven should be already preheated to the curing temperature.
• After the initial cure is finished the post curing should be carried out within 2 hours, ideally in the same oven.

Cure Schedule

• 1hour @ 130-135°C + 6-8hours @ 130-135°C
• 1hour @ 125-130°C + 6-8hours @ 130-135°C
• 1hour @ 105-120°C + 6-8hours @ 130-135°C

This schedule is a general recommended guideline for DIP LED that has to be adjusted based on your package type and package size. Smaller packages might benefit from a shorter Post cure schedule (ie 125°C for 4 hours) to avoid stress build up. If you have doubts whether the product has fully cured, you can run a DSC analysis on the cured sample and observe the exothermic heat flow. If there's none, it would signify that the epoxy is fully crosslinked or cured.

Post Curing is not advised to skip. The post-curing step is where the full potential of the encapsulant is achieved such as strength, hardness, thermal stability, and reliability to name a few.  Skipping cure, on the other hand, means incomplete epoxy cure which will increase the risk of delamination, and package crack. If epoxy is fully cured, there will be no residual unreacted material.

Using Additives

Optolinq OLS-1211 can be mixed with diffusing agents or color pastes to achieve customer-specific purposes.

Recommended quantity of various diffusing agents and color pastes:

• OPC-R Red Color Paste: 0.1-0.5% by epoxy weight
• OPC-B Blue Color Paste: 0.1-0.5% by epoxy weight
• OPC-G Green Color Paste: 0.1-0.5% by epoxy weight
• ODF-090 Diffusing Agent: 3-5% by weight (LED lamps), 4-8% (LED displays)

For example, ODF would be 100 : 100 : 3~5 for LED lamps

Storage and Handling

OPTOLINQ OLS-1211 is supplied in 5Kg cans and should be kept in a cool and dry place (40% – 75% humidity) away from direct sunlight or temperature extremes. It should not contact any acid and alkali substances. Consult the Safety data sheet for the handling of this product

The product comes in fluorinated drums. Please keep it at 0-30° and use it within the shelf life .After the Can is opened, the unused product should avoid prolonged contact with air. Try to tightly seal the package to ensure its stable performance.

Shelf life at 0-30°C:

Part A: 6 months

Part B: 3 months

Data Ranges

The data contained herein are reported as typical values and/or range values based on actual test data and are verified on a periodic basis. They are reference values and not guaranteed specifications.